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Home > Archive > Electrical Engineering > February 2007 > Yelp!!! (Induction Generators...)
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Yelp!!! (Induction Generators...)
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| simplyagam 2007-02-10, 9:25 am |
| Hi!
New to Usenet Groups so plz don't mind the inhibitions... the thing's
this... I was trying to do some study in Induction Generators so I go
to all these web pages, Wind Power... captive generation... etc etc...
ok cool... but what about the principles... so I download a few IEEE
papers, read a thesis or two... yaa they have the mathematical model
(dq0 or per-phase etc etc)... the simulation even works... wonderful,
But all this time, the thing which's being irritating me is the basic
principle... what I could find till now is dis... just like in
Induction Motors, the rotor follows the synchronously rotating mmf, in
IGs its the opposite... the rotor is ahead and the mmf of the
generated electric field is following it. This is fine, and can be
visualized when we connect an IG to grid and rotate the prime mover
wid speed greater than the grid frequency... BUT... the problem I have
is in self-excited IGs,
They say that u require a reactive power source (usually a charged
capacitor or smthing)... dis is not ENUF!!! How does one explain the
building up of voltage... I mean how can I visualize it? There is no
external excitation to rotor... so how's the induction phenomenon
causing the rotating rotor to induce voltage back into the stator
windings.... it just doesnt make any sense....
I mean in synchronous generators, we can justify that yes.. dere is a
rotating magnetic field (due to excited rotor) viz. cutting the stator
coils and emf's being induced... In DC generators, its pretty much the
same thing as excitation source (or atleast remenant magnetic field)
is there helping the field windings... but what the heck is going on
in IGs....
Smone having anyy idea.... plz plz plz help me..... my project's
dependent on it.
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| Salmon Egg 2007-02-10, 9:25 pm |
| On 2/10/07 6:14 AM, in article
1171116871.546462.91440@h3g2000cwc.googlegroups.com, "simplyagam"
<simplyagam@gmail.com> wrote:
> Hi!
<snip>
Study English composition first so my eyes do not glaze over when I read
your post.
Bill
-- Fermez le Bush--about two years to go.
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| TimPerry 2007-02-11, 1:25 pm |
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> <snip>
>
> Study English composition first so my eyes do not glaze over when I
> read your post.
>
> Bill
some of the posts reminds me of the stewardess in "Airplane" asking if
anyone on the plane can translate Jive.
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